EP2390977B1 - Covering section, in particular covering frame and electric installation device with this covering section - Google Patents

Description

• für das Sockelteil mindestens einer elektrischen Installationsvorrichtung, insbesondere zur Unterputzmontage, welche einen Tastschalter aufweist, durch den über ein Betätigungselement, das unter einem Betätigungsdruck auf seine Oberseite einen Betätigungsweg aus einer Ruheposition in eine Schaltposition zurücklegt, ein Schaltvorgang ausgelöst wird,
• mit einem Rahmenkörper, der eine Deckfläche aufweist und das Betätigungselement randseitig umgibt, nach dem Oberbegriff des Anspruchs 1.

The present invention relates to a cover part, in particular a cover frame,

• for the base part of at least one electrical installation device, in particular for flush mounting, which has a pushbutton switch, by means of which an actuating element which travels an actuation path from a rest position to a switching position under an actuation pressure on its upper side triggers a switching operation,
• with a frame body having a top surface and the actuating element peripherally surrounding, according to the preamble of claim 1.

Furthermore, the invention relates to an electrical installation device, in particular for flush mounting, which has a key switch in a base part, through which an actuating element, which under actuation pressure on its upper side a actuation path from a rest position travels to a switching position, a switching operation is triggered, and which comprises a cover part with a frame body having a cover surface, which surrounds the actuating element at the edge, according to the preamble of claim 19.

A similar cover member and such an electrical installation device are from the DE 20 2008 001 092 U1 known. The known cover frame is associated with an electrical installation device having a functional attachment, which is an as described above actuating element, for. B. a touch-type rocker or a so-called touch attachment, can act. The function attachment interacts with a board arranged thereunder, on which electrical switching contacts are located on the upper side. The board in turn has electrical line connections, which serve to connect an arranged underneath to be switched electrical device. The electrical device is located in a base part, which has a support ring and claws for attachment in a box, such as a hollow wall box. The board is thereby received by a support frame, which is positively and non-positively connected via clamping springs with the base part and the frame body. For assembly, first the base part is clamped in the box. Thereafter, the cover frame is placed on the support ring of the base part and the wall. The support frame is connected with inserted board - acting as a clamping piece - connected to the base part and the frame body, and finally the actuating element is placed, which is peripherally surrounded by the frame body. The electrical installation device is in particular designed such that it allows a so-called wallpaper compensation, and has proven itself in practice.

The DE 41 34 044 A1 describes both a cover and an electrical installation device of the type mentioned. In particular, this document describes a door system, in particular a door entry system, with a housing, a receiving frame, a plurality of rectangular, preferably square functional units and possibly sealing and veneering, wherein the receiving frame in or provided on the housing and preferably pivotally and fixably connected to the housing and accommodates the functional units, and wherein the functional units have a functional element or a plurality of functional elements. The functional units are connected by means of connecting elements. This last feature is considered to be indispensable, because it is achieved that the functional units of the door system can be juxtaposed and juxtaposed both side by side and from a receiving frame, wherein the receiving frame has no locking webs, to which each individual functional unit is attached.

The DE 11 84 393 B describes a hinged lid for housing electrical equipment, especially for switches and sockets, with a not visible from the outside, in a hinge part of the hinged lid and in the lockable by the latter housing in a receiving space of the same joint axis with bearings, the same in the housing after the interior are too open, wherein the receiving space is dimensioned in both directions longer than the width of the hinge part of the hinged lid. In this case, the hinge axis is loosely mounted in such a way that the hinged lid can be removed from the housing or inserted into the housing. It is therefore a two-part design of hinged lid and housing. One-piece hinged lid designs are used in the DE 11 84 393 B mentioned as prior art, but criticized as disadvantageous.

The present invention has for its object, a cover and an electrical installation device of the type mentioned in such a way that they are structurally simplified compared to the closest prior art and improved in terms of manufacturing ease.

This is achieved according to the invention in that the cover part has the features of claim 1 and the electrical installation device has the features of claim 19.

It is particularly advantageous if the top of the actuating element is designed as a flat surface which, when the actuating element is in its rest position, is aligned with the top surface of the frame body. As a result, with a default size of the outer contour of a frame initially in ergonomically optimal training a larger compared to the known cover operating surface on the actuating element, since this is not covered by overlying webs of the frame body. It need to be provided in an economically favorable manner for operation no protruding through the frame body projections on the actuator, but the actuator can be made flat, so that the cover further so also less quickly polluted and easier to clean.

In addition, this structurally simple construction of the cover according to the invention is also very easy to manufacture, because the actuator and the frame body in a little complex manner, for example, as a plastic injection molded part, can be produced. In this case, for example polycarbonates, z. As polyoxymethylene, polymethacrylate or reinforced plastics, such as fiber-reinforced polyamide, are used. The joint, via which the actuating element and the frame body are connected to each other, may preferably be a film hinge, so that the frame body and the actuating element are integrally formed. The joint can be sufficiently unbreakable and resiliently designed for the dynamic load that it is subject when the actuator is brought under the operating pressure on its upper side from the rest position, that the actuating element after elimination of the operating pressure from its switching position automatically returns to its resting position.

The frame body may have on its underside fasteners for positive, non-positive and / or material connection with a serving for attachment to the base part of the electrical installation device according to the invention connecting part. With this connecting part, the cover according to the invention can be combined to form a single unit, for which - as shown in more detail below - the assembly cost of an electrical installation device compared to the assembly steps described above even more reduced.

With the advantage of a flexible usability can also be provided that the frame body two or more actuators for electrical installation devices with switching function and / or structures for other electrical installation devices with other than switching function, such. B. a socket cover includes.

Finally, it is also possible to realize a wallpaper compensation with the cover according to the invention in various ways, which will also be discussed in detail below.

Further advantageous features of the invention are contained in the subclaims and the following description.

Fig. 1

in einer Draufsicht eine erste Ausführung eines erfindungsgemäßen Abdeckteils,

Fig. 2

die erste Ausführung eines erfindungsgemäßen Abdeckteils in einer Schnittansicht gemäß der Linie II-II in Fig. 1,

Fig. 3

die erste Ausführung eines erfindungsgemäßen Abdeckteils in einer Schnittansicht gemäß der Linie III-III in Fig. 1,

Fig. 4

die erste Ausführung eines erfindungsgemäßen Abdeckteils in einer perspektivischen Darstellung,

Fig. 5

in einer Draufsicht eine zweite Ausführung eines erfindungsgemäßen Abdeckteils,

Fig. 6

die zweite Ausführung eines erfindungsgemäßen Abdeckteils in einer Schnittansicht gemäß der Linie VI-VI in Fig. 5, zusammen mit einer ersten Ausführung eines erfindungsgemäßen Klemmteils zur Verbindung mit einem Sockelteil einer erfindungsgemäßen elektrischen Installationsvorrichtung,

Fig. 7

die zweite Ausführung eines erfindungsgemäßen Abdeckteils in einer Schnittansicht gemäß der Linie VII-VII in Fig. 6, zusammen mit der ersten Ausführung des erfindungsgemäßen Klemmteils zur Verbindung mit einem Sockelteil einer erfindungsgemäßen elektrischen Installationsvorrichtung,

Fig. 8

die zweite Ausführung eines erfindungsgemäßen Abdeckteils in einer perspektivischen Explosionsdarstellung, zusammen mit der ersten Ausführung des erfindungsgemäßen Klemmteils zur Verbindung mit einem Sockelteil einer elektrischen Installationsvorrichtung,

Fig. 9

die zweite Ausführung eines erfindungsgemäßen Abdeckteils in einer weiteren perspektivischen Explosionsdarstellung, zusammen mit der ersten Ausführung des erfindungsgemäßen Klemmteils zur Verbindung mit einem Sockelteil einer erfindungsgemäßen elektrischen Installationsvorrichtung,

Fig. 10

in einer Draufsicht eine dritte Ausführung eines erfindungsgemäßen Abdeckteils,

Fig. 11

die dritte Ausführung eines erfindungsgemäßen Abdeckteils in einer Schnittansicht gemäß der Linie XI-XI in Fig. 10, zusammen mit einer zweiten Ausführung eines erfindungsgemäßen Klemmteils zur Verbindung mit einem Sockelteil einer elektrischen Installationsvorrichtung,

Fig. 12

die dritte Ausführung eines erfindungsgemäßen Abdeckteils in einer Schnittansicht gemäß der Linie XII-XII in Fig. 10, zusammen mit der zweiten Ausführung des erfindungsgemäßen Klemmteils zur Verbindung mit einem Sockelteil einer erfindungsgemäßen elektrischen Installationsvorrichtung,

Fig. 13

die dritte Ausführung eines erfindungsgemäßen Abdeckteils in einer perspektivischen Explosionsdarstellung, zusammen mit der zweiten Ausführung des erfindungsgemäßen Klemmteils zur Verbindung mit einem Sockelteil einer erfindungsgemäßen elektrischen Installationsvorrichtung,

Fig. 14

eine vierte Ausführung eines erfindungsgemäßen Abdeckteils in einer perspektivischen Darstellung,

Fig. 15

bis 19 in Schnittdarstellungen, verschiedenartige in der Praxis auftretende Montagebedingungen für erfindungsgemäße elektrische Installationsvorrichtungen zur Veranschaulichung der Notwendigkeit eines Tapetenausgleichs, der mit einem erfindungsgemäßen Abdeckteil vorgenommen werden kann,

Fig. 20

in einer Unteransicht, eine fünfte Ausführung eines erfindungsgemäßen Abdeckteils mit einer ersten Ausführung eines Tapetenausgleichs mit Hilfe eines Blendrahmens,

Fig. 21

die fünfte Ausführung eines erfindungsgemäßen Abdeckteils in einer Seitenansicht,

Fig. 22

die fünfte Ausführung eines erfindungsgemäßen Abdeckteils in einer Schnittansicht gemäß der Linie XXII-XXII in Fig. 20,

Fig. 23

die fünfte Ausführung eines erfindungsgemäßen Abdeckteils in der Draufsicht,

Fig. 24

in einer Fig. 20 entsprechenden Unteransicht, den zum Tapetenausgleich verwendeten Blendrahmen der fünften Ausführung eines erfindungsgemäßen Abdeckteils als Einzelteil,

Fig. 25

den Blendrahmen der fünften Ausführung eines erfindungsgemäßen Abdeckteils in einer Fig. 21 entsprechenden Seitenansicht,

Fig. 26

den Blendrahmen der fünften Ausführung eines erfindungsgemäßen Abdeckteils in einer Fig. 22 entsprechenden Schnittansicht gemäß der Linie XXVI-XXVI in Fig. 24,

Fig. 27

den Blendrahmen der fünften Ausführung eines erfindungsgemäßen Abdeckteils in einer Fig. 23 entsprechenden Draufsicht,

Fig. 28

den Blendrahmen der fünften Ausführung eines erfindungsgemäßen Abdeckteils in perspektivischer Darstellung,

Fig. 29

in einer Schnittansicht gemäß der Linie XXX-XXX in Fig. 5, eine erfindungsgemäße elektrische Installationsvorrichtung und dabei eine Darstellung, wie eine zweite Ausführung eines Tapetenausgleichs bei der zweiten Ausführung eines erfindungsgemäßen Abdeckteils realisiert werden kann, wobei sich das Abdeckteil in einem ersten Wandabstand befindet,

Fig. 29a

eine Fig. 29 zugeordnete Schnittansicht gemäß der Linie VII-VII in Fig. 5, jedoch jeweils nur im Halbschnitt durch die rechte Seite und in vergrößertem Maßstab,

Fig. 30

eine Schnittansicht wie in Fig. 29, wobei sich das Abdeckteil jedoch in einem zweiten Wandabstand befindet,

Fig. 30a

eine Fig. 30 zugeordnete Schnittansicht in einer Darstellungsart wie in Fig. 29a,

Fig. 30b

eine vergrößerte Darstellung eines in Fig. 30a gezeigten Klemmnockens,

Fig. 31

in einer Unteransicht, ein Verbindungsteil einer sechsten Ausführung eines erfindungsgemäßen Abdeckteils mit einer dritten Ausführung eines Tapetenausgleichs unter Verwendung eines Ausgleichselementes,

Fig. 32

das erfindungsgemäße Verbindungteil der sechsten Ausführung eines erfindungsgemäßen Abdeckteils in einer Schnittansicht gemäß der Linie XXXII-XXXII in Fig. 31,

Fig. 32a

die in Fig. 32 mit E bezeichnete Einzelheit des Verbindungteils der sechsten Ausführung eines erfindungsgemäßen Abdeckteils,

Fig. 33

das erfindungsgemäße Verbindungteil der sechsten Ausführung eines erfindungsgemäßen Abdeckteils in einer Schnittansicht gemäß der Linie XXXIII-XXXIII in Fig. 31,

Fig. 34

das erfindungsgemäße Verbindungsteil der sechsten Ausführung eines erfindungsgemäßen Abdeckteils in perspektivischer Darstellung,

Fig. 35

in einer Schnittansicht gemäß der Linie XXX-XXX in Fig. 5 eine Fig. 30 entsprechende Darstellung, wie die dritte Ausführung eines Tapetenausgleichs realisiert werden kann, wobei sich das Abdeckteil in einem ersten Wandabstand befindet,

Fig. 36

wie in Fig. 35, in einer Schnittansicht gemäß der Linie XXX-XXX in Fig. 5 eine Fig. 29 entsprechende Darstellung, wie die dritte Ausführung eines Tapetenausgleich realisiert werden kann, wobei sich das Abdeckteil in einem zweiten Wandabstand befindet.

On the basis of several shown in the drawing, preferred embodiments, the invention will be explained in more detail below. Showing:

Fig. 1

in a plan view of a first embodiment of a cover according to the invention,

Fig. 2

the first embodiment of a cover according to the invention in a sectional view along the line II-II in Fig. 1 .

Fig. 3

the first embodiment of a cover according to the invention in a sectional view along the line III-III in Fig. 1 .

Fig. 4

the first embodiment of a cover according to the invention in a perspective view,

Fig. 5

in a plan view of a second embodiment of a cover according to the invention,

Fig. 6

the second embodiment of a cover according to the invention in a sectional view along the line VI-VI in Fig. 5 , together with a first embodiment of a clamping part according to the invention for connection to a base part of an electrical installation device according to the invention,

Fig. 7

the second embodiment of a cover according to the invention in a sectional view along the line VII-VII in Fig. 6 together with the first embodiment of the clamping part according to the invention for connection to a base part of an electrical installation device according to the invention,

Fig. 8

the second embodiment of a cover according to the invention in an exploded perspective view, together with the first embodiment of the clamping part according to the invention for connection to a base part of an electrical installation device,

Fig. 9

the second embodiment of a cover according to the invention in a further perspective exploded view, together with the first embodiment of the clamping part according to the invention for connection to a base part of an electrical installation device according to the invention,

Fig. 10

in a plan view of a third embodiment of a cover according to the invention,

Fig. 11

in a sectional view along the line XI-XI in Fig. 10 together with a second embodiment of a clamping part according to the invention for connection to a base part of an electrical installation device,

Fig. 12

the third embodiment of a cover according to the invention in a sectional view along the line XII-XII in Fig. 10 together with the second embodiment of the clamping part according to the invention for connection to a base part of an electrical installation device according to the invention,

Fig. 13

the third embodiment of a cover according to the invention in an exploded perspective view, together with the second embodiment of the clamping part according to the invention for connection to a base part of an electrical installation device according to the invention,

Fig. 14

A fourth embodiment of a cover according to the invention in a perspective view,

Fig. 15

to 19 in sectional views, various practical installation conditions for electrical installation devices according to the invention to illustrate the need for a wallpaper compensation, which can be made with a cover according to the invention,

Fig. 20

in a bottom view, a fifth embodiment of a cover according to the invention with a first embodiment of a wallpaper compensation by means of a frame,

Fig. 21

the fifth embodiment of a cover according to the invention in a side view,

Fig. 22

the fifth embodiment of a cover according to the invention in a sectional view along the line XXII-XXII in Fig. 20 .

Fig. 23

the fifth embodiment of a cover according to the invention in plan view,

Fig. 24

in a Fig. 20 corresponding bottom view, the frame used for wallpaper compensation of the fifth embodiment of a cover according to the invention as a single part,

Fig. 25

the window frame of the fifth embodiment of a cover according to the invention in a Fig. 21 corresponding side view,

Fig. 26

the window frame of the fifth embodiment of a cover according to the invention in a Fig. 22 corresponding sectional view according to the line XXVI-XXVI in Fig. 24 .

Fig. 27

the window frame of the fifth embodiment of a cover according to the invention in a Fig. 23 corresponding top view,

Fig. 28

the frame of the fifth embodiment of a cover according to the invention in perspective view,

Fig. 29

in a sectional view along the line XXX-XXX in Fig. 5 an electrical installation device according to the invention and an illustration of how a second embodiment of a wallpaper compensation can be realized in the second embodiment of a cover part according to the invention, the cover part being at a first wall distance,

Fig. 29a

a Fig. 29 associated sectional view along the line VII-VII in Fig. 5 , but only in half section through the right side and on an enlarged scale,

Fig. 30

a sectional view as in Fig. 29 but with the cover part at a second wall distance,

Fig. 30a

a Fig. 30 Associated section view in a display style as in Fig. 29a .

Fig. 30b

an enlarged view of an in Fig. 30a shown clamping cam,

Fig. 31

in a bottom view, a connecting part of a sixth embodiment of a cover according to the invention with a third embodiment of a wallpaper compensation using a compensation element,

Fig. 32

the inventive connecting part of the sixth embodiment of a cover according to the invention in a sectional view along the line XXXII-XXXII in Fig. 31 .

Fig. 32a

in the Fig. 32 with E designated detail of the connecting part of the sixth embodiment of a cover according to the invention,

Fig. 33

the inventive connecting part of the sixth embodiment of a cover according to the invention in a sectional view along the line XXXIII-XXXIII in Fig. 31 .

Fig. 34

the connecting part according to the invention of the sixth embodiment of a cover according to the invention in a perspective view,

Fig. 35

in a sectional view along the line XXX-XXX in Fig. 5 a Fig. 30 corresponding representation of how the third embodiment of a wallpaper compensation can be realized, wherein the cover is located at a first distance from the wall,

Fig. 36

as in Fig. 35 in a sectional view according to the line XXX-XXX in Fig. 5 a Fig. 29 corresponding representation of how the third embodiment of a wallpaper compensation can be realized, wherein the cover is located at a second distance from the wall.

In the figures of the drawing, the same or corresponding parts are always provided with the same reference numerals, so that they are usually described only once in each case.

As it turned out first Fig. 1 to 4 shows, a cover 1, in particular a cover, a square in particular in plan view formed frame body 2 and an actuating element 3. The actuating element 3 is assigned to an electrical installation device, which has a push-button switch which triggers a switching operation via the actuating element 3. In this case, the actuating element 3 sets an actuation path (in a direction perpendicular to the plane of the drawing) under an actuation pressure p on its upper side 4 Fig. 1 down or in Fig. 2 to the left or in Fig. 3 upward) from a rest position shown in the figures in a switching position back.

Hereinafter, when the terms "bottom" and "top" are used, "bottom" is understood to mean the side of the cover part 1 facing a base part of an electrical installation device, concealed in the assembled state, or its components, and "top" the facing side of the cover part 1 ,

The upper side 4 of the actuating element 3 is preferably formed as a flat surface, which, when the actuating element 3 is in the rest position, with a also flat top surface 5 of the frame body 2 is aligned. The frame body 2 surrounds the actuating element 3 edge and is integrally formed with the actuating element 3, by - Fig. 2 can be seen - is connected to the actuating element 3 on one side according to the invention via a hinge 6, in particular a film hinge. The joint 6 is designed so resilient that the actuating element 3 automatically returns to its rest position after elimination of the actuating pressure p from its switching position. The switching and return movement of the actuating element 3 is in each case a pivoting movement about the axis of the film joint 6. The actuating element 3 is tongue-like released from the frame body 2, ie at the three not connected via the joint 6 with the frame body 2 sides is U-shaped a slot 7 between the actuator 3 and the frame body. 2

The actuating element 3 can - as in particular FIGS. 2 and 3 illustrate - have at least one projection 8, such as a particular wedge-shaped switching cam, which is located on the bottom 9 and in the switching position of the actuating element 3 in the switch triggers the switching operation. As Fig. 3 shows, a plurality of such switching cam 8 may be provided.

Furthermore, for stabilization and better guidance of its movement, the actuating element 3-arranged next to the slot 7-can have an edge web 10 projecting from the underside 9. The height of the edge web 10 can, in particular, as Fig. 2 shows, in adaptation to the deflection in the pivoting movement from the free end of the actuating element 3, starting in the direction of the joint 6 toward decrease.

Likewise, the frame body 2 in a conventional manner a circumferential, projecting from its underside 11 edge web 12 having a lower edge 12a. As a result, the frame body 2 appears in the perspective view of Fig. 4 cuboid. It is not absolutely necessary that between the top surface 5 and the edge web 12 edges 12 b are formed; It could also be provided there rounding.

The frame body 2 can - as in FIGS. 2 and 3 shown - on its underside 11 fasteners 13, whose function with reference to the below-described, in Fig. 5 to 9 illustrated second embodiment of a cover member 1 according to the invention will be explained.

The second embodiment of the invention first differs from the first in that a frame body 2 comprises two actuating elements 3a, 3b, which are respectively assigned in the electrical installation device present invention key switches. In the figures of the drawing, while the first actuator 3a associated parts in addition to the in Fig. 1 to 4 used reference number with the letter a and the second actuator 3b associated parts additionally denoted by the letter b and will not be described again specifically.

In the second embodiment of the invention, the above-mentioned slot 7 in the plan view in the form of a horizontal E. Each of the actuators 3a, 3b is of the frame body 2 only partially - one side and the other at its free end -. The actuators 3a, 3b are similar and are separated by the slot 7 side by side.

In addition to the cover part 1 according to the invention is in the second embodiment of the invention in Fig. 6 to 9 an inventive connecting part 14a shown. This connecting part 14a consists in this embodiment of plastic and is used for mounting the cover member 1 according to the invention in an electrical installation device according to the invention.

The connecting part 14a may have its own connecting elements 15a and the already mentioned, located on the bottom 11 of the frame body 2 fasteners 13 (in this version only in Fig. 7 can be seen) force fit and / or materially attached to the cover member 1 according to the invention. For this purpose, concretes are provided as connecting elements 15a on the connecting part 14a concretely shaped in the form of hollow cylindrical projections fasteners 13 of the cover 1 - optionally with a press fit and / or latching - inserted and in this optional - for example by gluing - additionally cohesively captive attached can. In the latter case, a single structural unit is formed from the cover part 1 and the connecting part 14a.

As far as its mounting on the electrical installation device is concerned, the connecting part 14a can be designed, in particular, as a clamping part, as shown. It has for this purpose clamping cam 16a, which cooperate for connecting in particular positive and positive fit with the electrical installation device. These clamping cams 16a sit - as the hollow pin, only on the other side - on one, only in Fig. 8 and 9 designated base plate 17a of the connecting part 14a. The base plate 17a is bordered by an edge web 18a whose height is slightly smaller than the height of the edge web 12 of the cover 1 and in the assembled state runs parallel to this.

The initially described in the presentation of the prior art assembly process is reduced when using a unit of cover 1 and connector 14a advantageously according to the invention thereby only two steps: Clamp the base part of elektischen installation device in a box, and then the assembly of cover 1 and connector Clip 14a into the base part.

In the Fig. 10 to 13 illustrated third embodiment of the invention differs from the second in that the connecting part 14b is made of metal. This applies both to its base plate 17b and to the parts used for connection to the electrical installation device. As such, in this embodiment, two clamping springs 16b provided. The connecting elements 15b for connection to the frame body 2 are designed as holes, while the corresponding fastening elements 13 are formed on the frame body 2 as a pin with a solid cross-section. As in the second embodiment, the connecting part 14b is in one piece - but not designed as an injection molded part, but as a bending stamped part. Instead of the illustrated connecting elements 15b of the connecting part 14b and the corresponding fastening elements 13 on the frame body 2, it is also possible that complete contours of the bending stamped part of plastic - for example by encapsulation - are included.

As for the reference numerals used in the second and third embodiments of the invention, it should be noted here that for the numbers 14 to 18 used in the second and third embodiments, the additional letter a or b does not refer to the same or similar parts of the actuators 3a, 3b but to Figs corresponding parts of the respective connecting parts 14a, 14b according to the invention relates.

The fourth, in Fig. 14 shown embodiment of the invention differs from the second and third embodiments in that the frame body 2 is not only integrally formed with two actuators 3a, 3b, each serving to switch electrical installation devices according to the invention, but that in the frame body 2 additionally has a structure 19 is embedded for another electrical installation device with other than switching function. Specifically, this is a socket, namely a Schuko socket cover.

In the in 15 to 19 sectional views shown are various occurring in practice mounting conditions for inventive electrical installation devices 20 shown, the base part 20a are in particular in each mounted in a wall 21 cans 22. These different installation conditions result in the need for a wallpaper compensation. Such can be done easily with the cover 1 according to the invention, for what at the following embodiments of the invention, various technical solutions will be described.

Fig. 15 shows first a mounting case in which the can 22 with a support ring 23 properly rests on the wall 21. The peripheral edge web 12 of the cover 1 is also on the wall 21 with its lower edge 12a. The can 22 located under the cover part 1, including the base part 20a of the electrical installation device 20, is covered gap-free. A gap 24 between the lower edge 12 a of the peripheral edge web 12 of the cover 1 and the wall 21 is absent or assumes the value zero.

Fig. 16 shows a mounting case in which the can 22 with its support ring 23 against the wall 21 - for example, by 0.8 mm - protrudes. The gap 24 between the lower edge 12a of the peripheral edge web 12 of the cover 1 and the wall 21 forms an open gap 24, a so-called shadow gap.

Fig. 17 shows a mounting case in which - in contrast to the previous two - the wall 21 is covered with wallpaper 25. The can 22 rests with its support ring 23 on the wall 21, and the wallpaper 25 ends professionally next to the support ring 23 of the box 22. The peripheral edge web 12 of the cover 1 lies with its lower edge 12a on the wallpaper 25. The can 22 located underneath the cover part 1 including the base part 20a of the electrical installation device 20 is covered gap-free, since the intermediate space 24 between the lower edge 12a of the peripheral edge web 12 of the cover part 1 and the wall 21 is filled by the wallpaper 25.

Fig. 18 also shows a mounting case in which the wall 21 is covered with wallpaper 25. The can 22 lies with its support ring 23 on the wall 21, but the wallpaper 25 does not end properly next to the support ring 23 of the box 22, but overlaps this circumferentially evenly. The peripheral edge web 12 of the cover 1 is located with its lower edge 12a on the wallpaper 25. Again, the box 22 located under the cover 1 and the base part 20a of the electrical installation device Covered 20 gap-free, since the gap 24 between the lower edge 12a of the peripheral edge web 12 of the cover 1 and the wall 21 is filled by the wallpaper 25.

Fig. 19 shows a mounting case similar to Fig. 18 , except that here the wallpaper 25 overlaps the support ring 23 of the can 22 circumferentially unevenly. Thus, the peripheral edge web 12 of the cover 1 can rest with its lower edge 12a on the wallpaper 25, to cover the lying under the cover 1 can 22 and the base part 20a of the electrical installation device 20 gapless cover, an oblique position of the cover 1 done.

From the sequence of figures 15 to 19 it can be seen that the principle of the wallpaper compensation consists in the different mounting cases, the surface 4/5 of the cover 1 relative to the base part 20a of the electrical installation device 20 - by inserting the cover part 1 into the base part 20a of different depth electrical installation device 20 and fixation in the respective plug position - to install at different distances. In the figures, however, in this regard, as well as characteristic size not this distance, but the distance between the bottom of the cover 1 in the region of the connecting part and the top of the support ring 23 is indicated by the reference numeral 26.

Fig. 20 to 28 refer to a fifth embodiment of a cover member 1 according to the invention, in a first embodiment, a wallpaper compensation can be made by a structurally specially designed frame. The frame is designated by the reference numeral 27 and in Fig. 20 to 23 in the assembled state to the cover 1 and in Fig. 24 to 28 shown as a single part.

Like a comparison of in Fig. 23 shown top view Fig. 5 and 10 shows, which is integrally formed from actuators 3a, 3b and frame body 2 executed assembly of the fifth embodiment substantially the same as the second and third embodiment of the invention. Also with regard to the type of fasteners 13 for the connecting part 14 a, it agrees with the second embodiment.

As FIGS. 20 to 22 show, in the plan view ( Fig. 24, 27 ) square-shaped frame 27 used for mounting from below into the frame body 2 of the cover part 1 according to the invention, as this particular Fig. 22 illustrated. The frame 27 consists of a frame portion 28 and a compensation portion 29, which in particular causes the latter that the frame 27 can emerge in the assembled state under spring action to varying degrees from the frame body 2.

The frame section 28 is a peripheral frame structure which can be arranged in a shape-adapted manner within the inner contour of the peripheral edge web 12 of the cover part 1 and thereby held in the cover part 1.

The entire compensation section 29 consists of four discrete elastic compensating elements 29a, which are fastened on each side of the frame section 28 on its upper side or preferably formed integrally therewith. Each compensating element 29a is bow-shaped in the manner of a rhombus and has four joints 30a, 30b, 30c, 30d in the rhombic corners, as best shown FIGS. 25, 26 and 28 can be seen. The lower hinge 30 a is connected to the frame portion 28. At the upper hinge 30c sits a lug-like design fastener 31, which can be clipped to secure the frame 27 on the frame body 2 in the frame body 2, preferably in a receptacle of the frame body 2, not shown, from below.

Due to the formation of the two lateral joints 30b and 30d, which are designed as spring joints, the resilient action of the compensation section 29 is achieved, wherein the distance H between the upper joint 30c and the lower joint 30a is variable. The area in the context of which this distance H variable is, can be determined constructively according to the intended maximum dimension of the wallpaper compensation.

After assembly of the frame 27 on the frame body 2, the frame portion 28 of the frame 27 is pushed out maximally below the lower edge 12a of the peripheral edge web 12 of the frame body 2 by the spring action of the compensation section 29, as this particular FIGS. 21 and 22 demonstrate. Now, when the cover member 1 according to the invention mounted in the electrical installation device 20 according to the invention, the compensation portion 29 is compressed while reducing the distance H between the joints 30c, 30a, and the distance H between the upper joint 30c and the lower joint 30a turns to a Value that is as large as the installation conditions allow or require wallpaper compensation. In all assembly cases, as in 15 to 18 If necessary, a wallpaper compensation can be carried out as required, so to speak automatically.

This applies in particular to a mounting case, as this in Fig. 16 is shown, wherein the located between the lower edge of the peripheral edge web 12 of the cover 1 and the wall 21 gap 24, the so-called shadow gap, is closed by the frame 27.

To the lying under the cover 1 can 22 and the base part 20a of the electrical installation device 20 in a mounting case according to Fig. 19 Cover gap-free, advantageously no tilting of the entire cover 1 must be done. The frame body 2 can be positioned parallel to the wall 21, and only the frame frame 27 with its frame portion 28 on the different sides to the wall installation different extent out of the frame body 2, since each compensation element 29a can be different degrees and independently of the other effective ,

Fig. 29 and 30 and Figures 29a and 30a show how wallpaper compensation can be made in another way. These figures are concretely related to the second embodiment of a cover part 1 according to the invention. The two sectional views 29 and 30 both relate to sections along the line XXX-XXX in FIG Fig. 5 while the sectional views 29a and 30a are in sections along the line VII-VII in FIG Fig. 5 Respectively. In addition, the each formed as a switch according to the invention βe electrical installation device 20 is shown, in which the cover 1 is mounted.

The wallpaper compensation is here in particular - in contrast to the previous version - made without additional parts. It is carried out only by a correspondingly to be expected in practice installation conditions ( 15 to 19 ) Predictive dimensioning and a different depth insertion of the assembly of frame part 2 and connecting part 14 a in the base part 20 a of the electrical installation device 20th

Fig. 29 and 29a show a mounting case, as in Fig. 15 is shown, in which the lying under the cover 1 box 22 including the base part 20a of the electrical installation device 20 is covered gap-free. A gap 24 between the lower edge 12 a of the peripheral edge web 12 of the cover 1 and the wall 21 is absent or assumes the value zero.

Fig. 30 and 30a show a mounting case, as in Fig. 17 is shown. It is - due to the presence of wallpaper 25 ( Fig. 30 Above) - a gap 24 between the lower edge 12 a of the peripheral edge web 12 of the cover 1 and the wall 21 is present.

A comparison between Fig. 29 and 30 shows that by the different depths insertion of the assembly of frame part 2 and connecting part 14a in the base part 20a of the electrical installation device 20 in the installed state according to Fig. 29 (Gap 24 equal to zero) of the switching cam 8a in a contact point AP immediately rests on the electrical installation device 20. Instead, there is at this point in the installed state according to Fig. 30 a distance between the switching cam 8a and the base part 20a of the electrical installation device 20, denoted by the reference symbol LH. This distance LH can be referred to as an idle stroke and must first be overcome when switching by the pivoting movement of the actuating element 3a before the switching operation is triggered.

It should be noted here that the geometry of the parts can also be designed so that the gap 24 between wall 21 and lower edge 12a of the frame part 2 then assumes the value zero, if a mounting case as in Fig. 16 - So a protruding wall box 22 - is present. Then it would already be with a so dimensioned cover 1, if the mounting case after Fig. 15 is to overcome an idle stroke LH.

In terms of a secure installation, it is important that at each insertion depth of the assembly of frame part 2 and connecting part 14a in the electrical installation device 20, a firm grip of the unit is guaranteed. This is especially how Figs. 29a and 30a illustrate this and as follows with reference to Fig. 30b is explained, achieved by a special design of the clamping cam 16a, but also the support ring 23.

The clamping cams 16a each have a web-like base portion 100, by means of which they are held on the clamping part 14a. On this base portion 100 sits a - seen in cross section - V-shaped widening clamping portion 110 with a first clamping leg 111 and a second clamping leg 112, wherein the first clamping leg 111 is slightly shorter than the second clamping leg 112 and the clamping legs 111, 112 in asymmetric Way on the base portion 100 fu-βen. The second clamping leg 112 is formed pointed by the presence of an insertion bevel 113 at its free end, while the first clamping leg 111 is formed blunt. The two clamping legs 111, 112 are resiliently springing against each other pressed.

The clamping cam 16a are jammed in unspecified openings of the support ring 23. These openings are bordered by a slightly tapering in the direction of the wall 21 also elastic edge web 200. For assembly, the clamping cam 16a under a movement against each other, on the one hand, the insertion of the required lateral pressure is generated on the other hand, the insertion bevel 113 on the other hand slightly widening on the funnel-like edge web 200 of the support ring 23, simply into the openings of the support ring 23rd pressed. This movement is terminated by the fact that the lower edge 12a of the edge web 12 of the frame body 2 on the wall 21 or the wallpaper 25 comes to rest and the wallpaper compensation is thus made. Between each clamping leg 111, 112 and the edge web 200 of the support ring 23 is formed at the in Fig. 30b designated by the reference numerals A1 and A2 - due to the elasticity of the parts surface - contact points a non-positive and positive connection. By this connection, the clamping piece 14a is held in the support ring 23. When dismantling the connection can be canceled by pulling out of the frame part 2 and connecting part 14a assembly from the support ring 23 again. Here, the clamping legs 111, 112 again - due to their V-shaped position to each other - pressed against each other, so that the clamping cam 16a can pass through the openings in the support ring 23.

The constructive basis for in FIGS. 31 to 36 illustrated third embodiment of a wallpaper compensation is initially the same as in the second embodiment and will not be described again.

Since the idle stroke LH present in the second embodiment may possibly impair the shift feel, the third embodiment is realized using a compensation element 300, which is shown in FIG Fig. 32a enlarged in a single view is shown. The principle of this wallpaper compensation consists in the fact that the compensation element 300 advantageously in each case installed automatically According to the second embodiment of the wallpaper compensation space, which determines the idle stroke LH of the actuators 3a, 3b, fills.

As at first FIGS. 31 to 34 show, the compensation element 300 is advantageously part of a connecting part 14 a. The latter is similar in structure to that in Fig. 6 to 9 illustrated connecting part 14a and therefore not designated by a separate reference numeral. It may instead of the connecting part 14a according to Fig. 6 to 9 be combined with a cover 1 according to the second embodiment of the invention. There are therefore two compensation elements 300 - for each actuator 3a, 3b of - provided. No projections 8a, 8b need to be provided on the undersides 9a, 9b of the actuating elements 3a, 3b, since their function is taken over by the compensating elements 300.

Each compensating element 300 is attached via a connecting web 310, which protrudes perpendicularly from an edge web 18a of the connecting part 14a, to an edge web 18a of the connecting part 14a, which in the assembled state lies on the side of the free end of the respective actuating element 3a, 3b under the frame body 2.

The compensation element 300 consists of a first, wedge-shaped section 320, which can be regarded as a filling section for the space of the idle stroke LH, and a second section 330, which is connected to the first section 320 and which, because of its function, to move the compensation element Drive section can be designated.

The wedge-shaped first section 320 in each case has a planar contact surface 32 for the lower sides 9a, 9b of the actuating elements 3a, 3b and an inclined surface 33 for engagement with the installation device 20 according to the invention, in particular at its push-button switch. As in FIGS. 32 and 32a As shown, the portion 320 need not be implemented as a solid, but may be open toward the installation device 20.

In the second section 330 are - as best Fig. 32a can be seen and only there with all the respective reference numerals in detail is designated - at the end of a centrally arranged feed piece 34, two arcuate spreading arms 35a, 35b, which are articulated via film hinges 36a, 36b on the feed piece 34. The hinges 36a, 36b are resiliently spaced so as to maximally spread the spreading arms 35a, 35b apart when no pressure is applied thereto, as this FIGS. 32, 32a and 33 demonstrate. One of the spreading arms 35a has a free end, while the other spreading arm 35b is articulated to the connecting web 310 via a further film joint 37. This further joint 37 is designed to be resilient so that it spreads apart the expansion arm 35b in the pressure-unloaded state maximally from the connecting web 310.

The operation of the compensation element 300 goes out Fig. 35 and 36 out. Fig. 35 shows again (in analogy to Fig. 30 ) a mounting case, as in Fig. 17 is shown where through the presence of wallpaper 25, a gap 24 between the lower edge 12a of the peripheral edge web 12 of the cover 1 and the wall 21 is present. Fig. 36 shows (in analogy to Fig. 29 ) a mounting case, as in Fig. 15 is shown in which a gap 24 between the lower edge 12a of the peripheral edge web 12 of the cover 1 and the wall 21 is not present or assumes the value zero.

In the first case, the spreading arms 35a, 35b spread apart, in the second case maximum compressed, the corresponding pressure - symbolized by the in Fig. 36 D1 and D2 arrows - it comes about that the connecting part 14a is clamped between the frame body 2 and the support ring 23, wherein the free end of a Spreizarms 35a on the support ring 23 is supported.

In the first case, the wedge-shaped first portion 320 of the compensation element 300 is located below the actuating element 3a and fills the clearance between the actuating element 3a and the switch, which causes the idle stroke LH in the second embodiment of the wallpaper compensation.

A change in the spreading of the spreading arms 35a, 35b-characterized by the angular position relative to the centrally arranged feed piece 34-causes the second section 330, referred to as the drive section, and thus also the first section 320 connected via the feed piece 34, to be parallel to the upper side 4a of the actuating element 3a are shifted laterally. When the spreading arms 35a, 35b are compressed, this movement runs outward, that is, in the direction of the edge web 12 of the frame part 2, as indicated by the in FIG Fig. 36 indicated by the reference letter B arrow is displayed. When spreading, this movement is selbstätätig under the action of the spring joints 36a, 36b, 37 in the reverse direction, ie inwards. The wedge-shaped first section 320 ensures in this movement by the action of its inclined surface 33, that the respective existing distance between the lower sides 9a, 9b of the actuators 3a, 3b and the top of the installation device 20 is bridged. For an accurate performance of the compensation element 300, the angle of inclination p of the inclined surface 33 must be matched to the extent to which the spreading arms 35a, 35b move from their fully compressed position (FIG. Fig. 36 ) can be maximally spread. As a result, a size range for the wallpaper compensation can be determined with advantage.

The invention is not limited to the embodiments described, but also includes all the same in the context of the invention embodiments, as already apparent from the foregoing description. Thus, a covering part according to the invention could, in contrast to the illustrated examples, also be designed with a frame body 2 with a round outer contour and / or with actuating elements 3, 3a, 3b with a round outer contour, without departing from the scope of the invention. It is also possible to use the cover part 1 according to the invention in a surface mountable electrical installation connection.

Furthermore, the skilled person can provide additional technical measures by which the invention is designed in an appropriate manner. So z. Tie Upper sides 4, 4a, 4b of the actuators 9, 9a, 9b - center or edge in the region of the slot 7 - as a window for in the installation device 20 - for example, to control the switching state - existing bulbs recesses may be provided.

LIST OF REFERENCE NUMBERS

1

cover

2

Frame body of 1

3

Actuator - Fig. 1

3a

Actuator - Fig. 5-14 . 20-23 . 29-30b . 35 . 36

3b

Actuator - Fig. 5-14 . 20-23

4

Top of 3

4a

Top of 3a

4b

Top of 3b

5

Deck area of 2

6

Joint between 2 and 3

6a

Joint between 2 and 3a

6b

Joint between 2 and 3b

7

slot

8th

Lead on 3 to 9

8a

Projection on 3a to 9a

8b

Projection on 3b to 9b

9

Bottom of 3

9a

Bottom of 3a

9b

Bottom of 3b

10

Randsteg at 9

10a

Randsteg at 9a

10b

Randsteg at 9b

11

Bottom of 2

12

Randsteg at 11

12a

Bottom edge of 12

12b

Edge on 2

13

Fixing at 11

14a

Connecting part - Fig. 6-9 . 29-36

14b

Connecting part - Fig. 11-13

15a

Connecting element of 15a

15b

Connecting element of 15b

16a

Clamping cams from 14a

16b

Spring of 14b

17a

Base plate of 14a

17b

Base plate of 14b

18a

Randsteg at 17a

18b

Randsteg at 17b

19

additional structure in 2

20

Installation device (switch) - Fig. 15-19 . 29-30b . 35 . 36

20a

Base part of 20

21

Wall - Fig. 15-19

22

Can - Fig. 15-19

23

Support ring - Fig. 15-19 . 29-30b . 35 . 36

24

Space between 12a and 21st

25

wallpaper

26

Distance between 1 and 23 - Fig. 15-19

27

Frame - Fig. 20-22 . 24-27

28

Frame section of 27

29

Compensation section of 27

29a

Compensation element of 29

30a

Joint from 29 to 28 (below)

30b

Joint of 29 (side)

30c

Joint of 29 (top)

30d

Joint of 29 (side)

31

Fastener for 27 in 2

32

Contact surface of 320 for 9, 9a, 9b

33

Sloping surface for attachment to 20

34

Feed piece of 330

35a

Spreader arm from 330 for attachment to 23

35b

Spreader arm from 330 to 31

36a

Film joint 35a / 34

36b

Film joint 35b / 34

37

Film joint 35b / 31

100

Base section of 16a

110

Clamping section of 16a

111

first clamping leg of 110

112

second clamping leg of 110

113

Insertion bevel at 111

200

Randsteg on 23

300

compensation element

310

Connecting bar for 300

320

first deduction of 300

330

second section of 300

A1

Plant from 111 to 200

A2

Plant from 112 to 200

AP

Investment point from 8a to 20 - Fig. 29

B

Movement direction from 300 - Fig. 36

D1

Printing effect from 23 to 300

D2

Printing effect from 2 to 300

H

Distance between 30c and 30a

LH

Idle stroke - Fig. 30

p

Actuation pressure on 4, 4a, 4b for 3, 3a, 3b

Claims (20)

1. Covering part (1), in particular covering frame,

   - for the base part (20a) of at least one electrical installation device (20), in particular for flush mounting, which device has a momentary-contact switch, by means of which a switching operation is triggered via an actuating element (3, 3a, 3b) which, under an actuating pressure (p) on its top side (4, 4a, 4b), travels an actuating distance from a rest position to a switching position,

   - having a frame body (2) which has a top surface (5) and surrounds the actuating element (3, 3a, 3b) at the border thereof,

   the frame body (2) being connected to the actuating element (3, 3a, 3b) via a joint (6, 6a, 6b),
   characterized in that the actuating element (3, 3a, 3b) and the frame body (2) are integrally formed.
2. Covering part (1) according to claim 1,
   characterized in that the top side (4, 4a, 4b) of the actuating element (3, 3a, 3b) is formed as a flat surface which, when the actuating element (3, 3a, 3b) is in its rest position, is flush with the top surface (5) of the frame body (2).
3. Covering part (1) according to claim 1 or 2,
   characterized in that the actuating element (3, 3a, 3b) and the frame body (2) consist of a plastics material.
4. Covering part (1) according to one of claims 1 to 3,
   characterized in that the joint (6), via which the actuating element (3, 3a, 3b) and the frame body (2) are connected to one another, is formed in such a resilient manner, or in that the actuating element (3, 3a, 3b) is biased in such a resilient manner, that the actuating element (3, 3a, 3b) after removal of the actuating pressure (p) returns from its switching position to the rest position, the joint (6, 6a, 6b), via which the actuating element (3, 3a, 3b) and the frame body (2) are connected to one another, preferably being a film hinge.
5. Covering part (1) according to one of claims 1 to 4,
   characterized in that the actuating element (3, 3a, 3b) is cut free from the frame body (2), a slot (7) being located between the actuating element (3, 3a, 3b) and the frame body (2).
6. Covering part (1) according to one of claims 1 to 5,
   characterized in that the actuating element (3, 3a, 3b) on its bottom side (9, 9a, 9b) has at least one projection (8, 8a, 8b), such as a switching cam, which in the switching position of the actuating element (3, 3a, 3b) triggers the switching operation in the momentary-contact switch.
7. Covering part (1) according to one of claims 1 to 6,
   characterized in that the frame body (2) has on its bottom side (11) fastening elements (13) for form-locked, force-locked and/or material-locked connection to corresponding connecting elements (15a, 15b) of a connecting part (14a, 14b), in particular a clamping part, serving for fastening to an electrical installation device (20), the frame body (2) and the connecting part (14a, 14b) preferably forming a preassembled unit.
8. Covering part (1) according to claim 7,
   characterized in that the connecting part (14a) has connecting elements (16a, 16b), such as clamping lugs (16a) or springs (16b), for in particular force-locked and form-locked connection to the electrical installation device (20).
9. Covering part (1) according to claim 7 or 8,
   characterized in that the connecting part (14a, 14b), in particular the preassembled unit of frame body (2) and connecting part (14a, 14b), is insertable to different depths into the electrical installation device (20) and fixable there for a wallpaper compensation, i.e. for closing a gap (24) between the frame body (2) and a/the wall (21) or a/the wallpaper (25).
10. Covering part (1) according to claim 9,
    characterized in that, for the different depths of insertion and fixing of the connecting part (14a) into/in the electrical installation device (20), the connecting part (14a) has clamping lugs (16a), which in turn have a web-like base section (100), by means of which they are held on the clamping part (14a), a clamping section (110), which widens in a V-shape seen in cross-section and has a first clamping arm (111) and a second clamping arm (112), being seated on this base section (100), the clamping arms (111, 112) being able to be elastically resiliently pushed towards one another.
11. Covering part (1) according to claim 9 or 10,
    characterized in that, for closing the gap (24) between the frame body (2) and a/the wall (21) or a/the wallpaper (25), a masking frame (27) is connected to the frame body (2), the masking frame (27) under spring action being able to protrude to varying degrees from the frame body (2), and preferably being able to be clipped into the frame body (2), in particular via fastening elements (31) arranged in the compensating section (29).
12. Covering part (1) according to claim 11,
    characterized in that the masking frame (27) consists of a frame section (28) and a compensating section (29), the frame section (28) being formed by a peripheral frame structure, which is arranged inside the frame body (2) in a manner adapted in shape thereto, and the compensating section (29) consisting of discrete resiliently formed compensating elements (29a) which are fastened to the frame section (28) or preferably formed integrally therewith, the compensating elements (29a) being preferably formed in the manner of a rhombus and having resilient joints (30a, 30b, 30c, 30d) at the rhombus corners.
13. Covering part (1) according to claim 9 or 10,
    characterized in that, in particular on the connecting part (14a), there is arranged a compensation element (300) which automatically fills spaces (LH) of different size which are formed between the electrical installation device (20) and the actuating element (3, 3a, 3b) by the different depths of insertion and fixing of the connecting part (14a) into/in the electrical installation device (20).
14. Covering part (1) according to claim 13,
    characterized in that the compensation element (300) consists of a first, in particular wedge-shaped, section (320) and a second section (330), the first section (320) in each case filling the spaces (LH) formed between the electrical installation device (20) and the actuating element (3, 3a, 3b), and by means of the second section (330) the compensation element (300) being movable in these spaces (LH), in particular the first section (320) being displaced laterally parallel to the top side (4, 4a, 4b) of the actuating element (3, 3a, 3b).
15. Covering part (1) according to claim 13 or 14,
    characterized in that the second section (330) of the compensation element (300) consists of a, in particular centrally arranged, advancing piece (34) on which there are articulated in each case via film hinges (36a, 36b) two, in particular arcuate, spreading arms (35a, 35b) pushable towards one another, the hinges (36a, 36b) being formed in such a resilient manner that they spread apart to the maximum the spreading arms (35a, 35b) when no pressure is exerted on them.
16. Covering part (1) according to claim 15,
    characterized in that one of the spreading arms (35a) has a free end, whereas the other spreading arm (35b) is articulated via a further film hinge (37) on a connecting web (310) of the connecting piece (14a), the further hinge (37) being formed in such a resilient manner that it spreads the spreading arm (35b) in the pressure-unloaded state to the maximum from the connecting web (310).
17. Unit formed of a covering part (1) according to one of claims 1 to 16 and a connecting part (14a, 14b), in particular a clamping part, the connecting part (14a, 14b) being connected via connecting elements (15a, 15b) in a form-locked, force-locked and/or material-locked manner to corresponding fastening elements (13) of the covering part (1) and having connecting elements (16a, 16b), such as clamping lugs (16a) or springs (16b), for force-locked and form-locked connection to the base part (20a) of an electrical installation device (20).
18. Unit according to claim 17,
    characterized by a connecting part (14a, 14b) having the features of the characterizing part of one of claims 9, 10 or 13 to 16.
19. Electrical installation device (20), in particular for flush mounting, which device has in a base part (20a) a momentary-contact switch, by means of which a switching operation is triggered via an actuating element (3, 3a, 3b) which, under an actuating pressure (p) on its top side (4, 4a, 4b), travels an actuating distance from a rest position to a switching position, and which device comprises a covering part (1) having a frame body (2) with a top surface (5), which body surrounds the actuating element (3, 3a, 3b) at the boundary thereof, the frame body (2) being connected at one side to the actuating element (3, 3a, 3b) via a joint (6, 6a, 6b),
    characterized in that the actuating element (3, 3a, 3b) and the frame body (2) are integrally formed.
20. Electrical installation device (20) according to claim 19, having a covering part (1) according to one of claims 1 to 16 and/or a unit according to claim 17 or 18.

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